Super short one shot written while watching PoA. I'd like to just kind of apologise to Raffles in advance.
When Remus Lupin had got on the train earlier that day, he'd expected a fairly quiet journey back to his old school on his first trip as a professor not a student.
He'd gotten to the station early but fallen asleep almost the second he'd got on the train. He'd had a tiring few days, what with having to travel back to London just to get back on the train to Scotland. He'd hoped to sleep through the rest of the journey.
It was hard to believe he'd almost managed to sleep through a Dementor attack but, Remus considered, he barely had any happy memories left any more. They'd all involved James or Peter or... Or Sirius. His memories that may once have been happy just made him feel worse. And the cold didn't bother him any more, it couldn't in the places he'd had to sleep over the last few days.
Even after the unlikely event of a Dementor attack on a train to a school, of all places, Remus never could have guessed what happened next.
It barely took him a second to recognise James's son. Every part of him looked like his father, especially that mop of hair. But he had to wait to reminisce. Harry had fainted just from the Dementor's presence in the compartment and he couldn't just let him lay there.
Harry wasn't unconscious for very long but when he woke up, Remus knew he had to leave again. Even the boy's voice sounded like his old friend's and his eyes... He knew he'd have to meet Harry eventually, he'd be teaching him for god sake, but he thought he'd have time to prepare himself first. And he hadn't counted on such a strong resemblance.
Remus made a hasty excuse about going to see the driver, although lord only knew where that came from, and left Harry's friends, a boy who was obviously a Weasley and a girl he couldn't place, in the compartment.
Only when he left and walked further down the corridor did he let himself practically collapse against the wall of the train. He could barely breathe now, grief stronger than he'd felt in years hitting him like a tsunami. First Sirius escaping Azkaban, now he was face to face with his only connection to his other closest friends.
This was going to be a hard year, in ways he hadn't even even imagined when Professor Dumbledore had finally located him those few short weeks ago.